Fundamental frequence of violin string

Two identical violin strings, when in tune and stretched with the same tension, have a fundamental frequency of 440.0 Hz. One of the strings is retuned by adjusting its tension. When this is done, 1.5 beats per second are heard when both strings are plucked simultaneously.

-What is the highest possible fundamental frequency of the retuned string?
-By what fractional amount was the string tension changed if it was increased?

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yellowmanjuu said:
Two identical violin strings, when in tune and stretched with the same tension, have a fundamental frequency of 440.0 Hz. One of the strings is retuned by adjusting its tension. When this is done, 1.5 beats per second are heard when both strings are plucked simultaneously.

-What is the highest possible fundamental frequency of the retuned string?
-By what fractional amount was the string tension changed if it was increased?
A. 441.5 Hz

not sure bout B